As nouns the difference between petralogy and tetralogy
is that petralogy is alternative form of lang=en while tetralogy is a set of four works of art that are connected, and that can be seen either as a single work or as four individual works. They are commonly found in literature, film, or video games.
tetralogy
Noun
(tetralogies)
A set of four works of art that are connected, and that can be seen either as a single work or as four individual works. They are commonly found in literature, film, or video games.
(medicine) A combination of four symptoms.
Synonyms
* quadrilogy (nonstandard)
Related terms
* trilogy (3)
* pentalogy (5)
* hexalogy (6)
* heptalogy (7)
* octalogy (8)
* ennealogy (9)
* decalogy (10)
* polylogy (2+)